Self-lubricating bolt



c. H, QRTMAN.

SELF LUBRICATING BOLT.

APPLICATION FILED Nov1 26. 1920.

1,4281252 PatentedSept. 5, 1922,

3 SHEETS-SHEET I.

Y n.- m

C. H. ORTMAN.

SELF LUBRICATING BOLT.

APPLlcATmH FILED Nov 26. 1920.

1,428,25g PatentedSept. 5, 1922i.

32 l ffl/@WIW Kw4 A mw C. H. ORTIVIAN.

SELF LUBRICATING BOLT.

APPLICATION FILED Novas, |920.

1,428,252, Patented Sept. 5, 1922.

3 SHEETS-SHEET 3.

M ,4M/XL @M1 /MMJ 'r FICE.

4 CHARLISH. GRTN, 0F CLEVELAND, OHIO.

SELF-LUBRICA'MN@ BOLT! Application led November 26, 1920. Serial No. 426,383.

To aZZ wlwm zt may concern.'

Be it known that I, CHARLES H. 011mm, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Self-Lubricating Bolts, of which the following is a full, clear, and exact description, reference being had to the accompanyingv drawings.

This invention relates to self lubricating bolts and is directedmore particularly .to shackle bolts for use in connection with automobile springs.

Some of the objects of the present invention are, to provide a bolt which shall be so constructed as to retain the lubricant between the bolt and bushing and prevent leakage about the ends thereof; to provide a bolt which shall be simple in construction, eicient in operation and inexpensive to manufacture, while further objects and advanv tages will appear as the description proceeds.

n the accompanying drawings wherein I have shown various illustrative embodiments of my invention, Fig. 1 is a sectional view of a shackle bolt constructed in accordance with my invention; Figs. 2-11 are similar views illustrating modified forms of -my invention and Figs. 12 and 13 are sectional views taken on the lines 12-12 and 13--13 respectively of Figs. 1 and 5. j

Describing by reference characters the various parts illustrated, and referring particularly to Figs. 1 and 12, 1 indicates the end portion of a spring which is formed with the usual eye 2. A bushing 3 is positioned in said eye and projects on each side thereof as shown inFig. 1. Each protruding end of said bushing is fitted with a ring 4 which is of a width substantially equal to the length of that portion of the bushing which projects beyond vthe spring eye 2. The shackles 5 5 are each provided with a bore 6, which is preferably of` a diameter substantially equal to the outer diameter of the spring eye 2 so that a thimble 7 iitted into said bore and abutting said eye will lie flush with the outer surface thereof. The space between the thimble- 7 and ring 4 is packed with any suitable packing material indicated at 8. A bolt 9 is journalled in the bushing 3 and is formed at one end with. a head 10 and a collar 11 which fits snugly within a thimble 7 and abuts the end of bushing 3, ring 4 and packing 8, while the other end of said bolt is threaded an indicated at 12.

' A nut 13 having a head 14 and va reduced collar 15, is threaded on said bolt in such manner as to position the portion 15 within the other thimble 7 andform a tight joint with the bushing 3, ring 4 and packin 8.

-Lubricant is injected to thev bearing sur ace of the bolt and bushing through a uitable lcup 17v which is connected therewi h by'a bore 18 and a' channel 19 (Fig. 12) formed longitudinally of the bolt'body 11.

Fig. -2 illustrates a modified form ofA my invention, in which a split bushing 22 is employed, each half of'which, isv formed with a head portion 23 which eliminates the rin 4 described in connection with Fig. 1. sleeve 2 4 is inserted between the bushing and the sprmg eye to prevent the lubricant from leaking by the joint formed by the abutting ends of said bushing. The construction of the remaining elements is .identical with that previously described.

A further modification is shown in Fig. 3, wherein the bushing 3a is` projected on each side of the spring eye a sufficient distance toform a seat for the cups 25-25. The packing material 8a is inserted in the cups about the elongated collars 11a and 15of the bolt and -nut and a spring washer 2O serves to retain said packing in light relationship above the parts. L

In Fig. 4I have shown a lsplit bushing 22?, each half of which is formed with an en- .largedhead 23 which serves as support for the thimbles 23-,26 fitted therein. The packing material is inserted between the thimbles 26 and collars 11" andfl'b of the nut and bolt in aV manner similar to that de- Vscribed in connection with Fig. 3. Sincea split bushing is employed, I provide a sleeve 24@ between said bushing vand spring eye to prevent loss of lubricant as set forth in -cess 30. A sleeve 24b is inserted between the bushing and spring eye as described in connection with Figs. 2 and 4.

The. construction shown in Fig. -6 illus-5 trates an elongated 'bushing 3b which is' fitted with rings aa-aa similar to that shown and described in connection With Fig. 1. Inthe present instance however the shackles Erb-5b are formed similar to those illustrated in Fig. 5 and the packing material scribed in .connection with Figs. 5 and 6.`

Fig. 8 shows a modification 1n which the bushingd and ringsllfc are similar to those described in connection With Figs. 1 and 7. In this form, however, a spring Washer 31 is fitted on each ring and abuts the side Wall of the spring eye. rllhe packing material is dis osedl about the rings 4c and the thimbles 3 32 fitted thereon hold it in place. rlhe abutting edges of the thimbles and spring Washers are preferably beveled as indicated at 33.

The form illustrated in Fig. 9 is provided With an elongated bushing 3e, the ends of which are fitted With cups 25a which retain the packing material. In this form a split ring -35.is placed on each collar 11i and 15d of the bolt and nut, said rings being interposed between the shackles 5d and the edge of the cups 25a thus retainlng the packing material Within the cups.

The seal shown in Fig. 10 is formed by providing an elongatedvbushing 3f, the ends of which are fitted With rings 4d. In this l form the shackles 5e are recessed as described in connection with Figs. 5 and 6 .and the packing material inserted in said recess. A split ring 35a is snapped over each rlng 4d and serves to hold the packing in place.

In Fig. 11 the ends of the elongated bushing 3g are fitted With cups 25b Which rece1ve a number of layers of packingmaterial, each layer being held by a spring Lenawee I Washer 36. The collars 10e and 15e of the bolt and nut form a suitable support for said packing and Washers. The use ofthe term packing inconnection with the 'various types of shackle bolts above described is used in its broadest sense and includes leather or any suitable form of packing material Which may be found desirable. f

Having thus described my invention, what l claim is:

1. In a shackle bolt, the combination with a bushing, of a bolt rotatably supported in said bushing, a collar located on said bolt adjacent the head thereof, a nut threaded on the opposite end of said bolt, a collar located adjacent said nut, a lubricating duct extending from the exterior of said device to the bearing'surface of said bolt, and packing means adjacent each of said collars for preventing egress of said lubricant.

2. ln a shackle bolt the combination with a bushing, of a bolt rotatably supported in said bushing, said bolt being formed with a head adapted to abut the outer face of a shackle, a collar located on said bolt adjacent said head, said collar being fitted into a bore in said shackle, a nut threaded on the end of said bolt and having a head abutting the outer face of a second shackle, a collar located adjacent said nut, said collar being fitted intoa bore in said second shackle, means for injecting lubricant to the bearing surface of said bolt, and packing means adjacent each of said collars for preventing egress of said lubricant.

3. In a shackle bolt, the combination with a bushing, of a bolt rotatably supported in said bushing, a collar located on said bolt adjacent the headthereof, a nut threaded on the opposite end of said bolt, a collar located adjacent said nut, a lubricating duct extending from tlaeexterior ofl said device to the bearing surface of said bolt, and packing material surrounding each of said collars preventing egress of said lubricant.

ln testimony whereof, l hereunto affix my signature.

, CHARLES H. ORTMAN. 

